After I lost my husband, I kept hearing about an organization for widowed women. Why, I wondered, would anyone want to wallow in misery with a bunch of other widows? Then I went on a weekend trip to New England that changed everything.

Most medical conditions are easy to spot. But attention deficit disorder (ADD) falls into a category of its own — not only is it similar to hundreds of other conditions, but the symptoms look like regular character flaws (think impulsivity and absentmindedness). The result: Millions of people remain undiagnosed — and untreated.

“I just know you are going to love it here …” The sugary voice of the real estate agent broke through my daydream, in which our future house featured prominently. “This yishuv is known for its warm and friendly atmosphere, there are several shuls to choose from, you’ll never find a house at this price so close to Jerusalem, and the schools are some of the best in the country.”